Why is my stitch length uneven?

What causes uneven stitch length?

When the bobbin case is threaded wrong, the upper thread and the lower one do not work in sync, forming uneven stitch or uneven feed among layers of fabric. Check the bobbin case and re-thread if needed. The thread should pass through the thread side slot in the case before being brought up to the needle.

What is uneven stitching?

Uneven stitching is caused by machine difficulties or by using the wrong size of needle for your fabric. Try thin ballpoint needles on coarse fabric, where the fibers can be pushed to the side, or use a heavier needle that can force its way through the fabric.

What controls the length of the stitches on a sewing machine?

3.01 SEWING MACHINE PARTS

A B
regulates the width of zigzag stitching and positions the needle for straight stitching stitch width control
regulates the length of the stitch stitch length control
located directly under the needle; usually has guidelines to help keep stitching straight needle or throat plate

What is the best stitch length for machine quilting?

For straight stitching, it is advised to set your machine’s stitch length to 2.5 to 3.0 or about 8-12 stitches per inch. This range works quite well for a majority of machine quilting but there are always exceptions when you make a rule. For threads with sparkle or shine, use a longer stitch length.

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Why is my straight stitch zig zag?

If the upper thread appears as a single line, the lower thread is incorrectly threaded. Instead of the appropriate tension being applied to the lower thread, it is pulled through the fabric when the upper thread is pulled up.